Table 2.
Subgroup analysis
|
Subgroup
|
Studies, n
|
SSD, n
|
SpDs, n
|
I
2
, %
|
P
value for heterogeneity
|
Pooled analysis (cat-RR/con-MD)
|
95%CI
|
P
value
|
| 2 L SSD with adjuvant vs SpDs | ||||||||
| Adequate bowel preparation (categorical)[11,12,22,23,25,27,28] | 7 | 1172 | 1177 | 51 | 0.05 | 1.00 | (0.95, 1.05) | 0.99 |
| BBPS score for right colon (continuous)[11,12,23-27] | 7 | 1227 | 1232 | 41 | 0.12 | 0.00 | (-0.05, 0.05) | 0.93 |
| OBPS score for right colon (continuous)[22] | 1 | 50 | 51 | |||||
| 2 L SSD without adjuvant vs SpDs | ||||||||
| Adequate bowel preparation (categorical)[11,15,16,18,21] | 5 | 932 | 938 | 90 | < 0.00001 | 0.86 | (0.72, 1.02) | 0.07 |
| BBPS score for right colon (continuous)[11,15] | 2 | 611 | 610 | 0 | 1.00 | 0.00 | (-0.07, 0.07) | 1.00 |
| OBPS score for right colon (continuous)[16,21] | 2 | 262 | 261 | 89 | 0.003 | 0.26 | (-0.20, 0.72) | 0.26 |
| 4 L SSD without adjuvant vs SpDs | ||||||||
| Adequate bowel preparation (categorical)[13,14,20] | 3 | 364 | 375 | 0 | 0.66 | 0.99 | (0.94, 1.05) | 0.82 |
| BBPS score for right colon (continuous)[14] | 1 | 172 | 167 | |||||
| OBPS score for right colon (continuous)[19,20] | 2 | 110 | 110 | 0 | 0.71 | -0.06 | (-0.30, 0.18) | 0.62 |
SSD: Same-day single-dose; SpDs: Split-dose; BBPS: Boston bowel preparation scale; OBPS: Ottawa bowel preparation scale; cat-RR/con-MD: Categorical-relative risk ratio/continuous-mean differences; CI: Confidence interval.